When your defensive identity is “give them enough plays to make a mistake “ something is wrong in the state of Denmark
This, x 1000. One of the things I loved about our D last year is that it forced so many 3-and-outs, which kept them fresh and gave our offense more chances. I can only imagine how many more points we would have scored with this year's offense with all the extra possessions last year's D would have given us. We could have won 15 games pairing that D with this O.
Granted, there were bound to be some changes due to departures of players like JJ, and we were bound to slip back a little bit. But it's the philosophy you describe in the quote above that is the biggest reason our D has taken such a huge step backward. The irony is that the philosophy is supposed to give our D more chances to make plays, but because of the passive approach, it actually gives them fewer chances to do so.
I don't know if Sean can change in any meaningful way. He will never become a smashmouth football guy.
He doesn't have to become a smashmouth guy in total, but he can move a little in that direction until he is balanced.
@Merlin and I were talking about Joe Gibbs and the Hogs yesterday, which is a great example of an offense that married a smashmouth running game that could steamroll over other teams with a dynamic passing game. In the Redskins best years during the Gibbs era, they would run over teams and wear them down and then hit them with a long pass to someone like Art Monk.
My other point is that coaches can change if they can put aside their stubborness and do some serious introspection. Remember John Robinson in the 80's? Started out with Dickerson, and the offense was pretty much student body left, student body right, run up the middle and occasionally throw a pass to keep the QB's arm warm. But realizing the limitations of the Rams offense at the time, he lobbied for and got his QB in Everett and then he hired a great offensive mind in Ernie Zampese and set him loose, and for a few years the Rams had one of the most exciting offenses in the league. And he did that without abandoning the running game because he had maulers up front that even a guy like Greg Bell could do well running behind.
I wouldn't want McVay to become a smashmouth guy at the expense of the passing game he envisions. But there's no reason those two things can't be put together.